Cary Elwes Geek cred: best known asWestley from 'The Princess Bride.' Other notable work includes 'Saw,' 'Glory,' 'Bram Stoker’s Dracula,' 'Robin Hood: Men in Tights,' 'Twister' and 'Shadow of the Vampire.' Television credits include 'The X-Files' and 'Psych.'

Billy Dee WilliamsGeek cred: best known as Lando Calrissian from 'The Empire Strikes Back' and 'Return of the Jedi.' Other credits include 'Undercover Brother,' 'Batman' and 'Brian’s Song,' along with roles on the television series 'Dynasty,' 'NCIS' and 'White Collar.'

John BarrowmanGeek cred: Malcom Merlyn from CW's 'Arrow,' Captain Jack Harkness in Russell T. Davies’ 'Doctor Who' and in the spinoff series 'Torchwood'

Photo: Frazer Harrison, Getty Images

John Barrowman
Geek cred: Malcom Merlyn from CW's 'Arrow,' Captain...

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James MarstersGeek cred: Spike from 'Buffy the Vampire Slayer' and 'Angel,' Brainiac from 'Smallville,' along with roles on 'Torchwood,' 'Caprica' and 'Warehouse 13.' He also appeared in 'PS I Love You,' 'The House on Haunted Hill,' and 'Dragonball: Evolution.'

Kevin J. AndersonGeek cred: wrote for 'Star Wars,' 'X-Files,' and 'Dune.' Original work includes 'Clockwork Angels,' the 'Saga of Seven Suns' series, the 'Terra Incognita' fantasy trilogy, and 'Zombie PI.'

John Scalzi Geek cred: bestselling author of 'Redshirts,' 'The Old Man's War,' and 'The Human Division.' Writer of the video game 'Midnight Star' and its accompanying graphic novel, 'Midnight Rises.' He was a creative consultant for 'Stargate: Universe' and the former president of the Science Fiction and Fantasy Writers of America.

Photo: Courtesy Photo

John Scalzi
Geek cred: bestselling author of 'Redshirts,' 'The Old...

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Peter Davison Geek cred: the Fifth Doctor on 'Doctor Who'

Photo: Photoshot

Peter DavisonGeek cred: the Fifth Doctor on 'Doctor Who'

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Austin St. JohnGeek cred: Jason Lee Scott (the original Red Ranger and first leader of the Power Rangers) from 'Mighty Morphin Power Rangers'

Austin St. John
Geek cred: Jason Lee Scott (the original Red Ranger...

Glenn Morshower Geek cred: Agent Aaron Pierce on FOX's '24.' Other credits include 'X-Men: First Class,' 'Men Who Stare at Goats' and 'Star Trek: Generations,' 'Bones,' 'Walker: Texas Ranger' and 'The West Wing.' Morshower also voiced or lent his likeness to the video games 'Call of Duty: Black-Ops 2' and 'Battlefield 3.'

Roy Thomas (not pictured)Geek cred: co-created 'Man-Thing,' 'Vision,' 'Red Sonja,' 'Iron Fist & Warlock,' launched Marvel’s 'What If' series and introduced 'Conan the Barbarian' (film version pictured) to American comics. He was also a staff writer before becoming the editor-in-chief of Marvel Comic in the 1960s.

Now is your chance to meet some of your favorite industry greats from both on-screen and behind-the-scenes. Comic stars will be taking over the George R. Brown Convention Center in downtown Houston May 23-26. Check out the gallery above for the full lineup.

This year will feature a Science Faction series, including lectures from the brightest minds in the space industry. NASA astronaut Stan Love, NASA scientist Sue Lederer and other brainiacs will discuss everything from asteroids to pioneering space colonies.

The George R. Brown Convention Center is located at 1001 Avenida de las Americas. The convention will be open Friday-Sunday 9 a.m.-2 a.m.; Monday's hours are 9 a.m.-8 p.m.